Lightweight and durable, this waterproof day pack has all the features needed for hauling gear in wet conditions. Radio frequency welded seams and reinforced fabric on the bottom and pocket area provides maximum strength and waterproofness. A mesh pocket accommodates a hydration bladder, stretch cording and gear loops secure extra gear, and compression straps cinch down your load. Breathable mesh shoulder straps offer a comfortable fit for alpine climbing and peak bagging.

Is this product appropriate for canyoneering: i.e. will the material tolerate the abrasive and abusive treatment in narrow canyons and will it be waterproof when submerged and while swimming through these canyons?

I think yes, with the caveat that most of my canyoneering has been done in Zion and the San Rafael Swell. This pack will definitely be waterproof in those conditions and will float. It won't be quite as durable as a heavy PVC drybag would be -- but if you have ever carried a normal fabric pack, soaking wet, with heavy drybags inside it, then you have a good frame of reference for whether that's a good trade-off. I think so.